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Distribution, Abundance and Morphological Characteristics of the Transcaucasian Rat Snake (Serpentes: Zamenis Hohenackeri Strauch, 1873) in Azerbaijan

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Distribution, Abundance and Morphological Characteristics of the Transcaucasian Rat Snake (Serpentes: Zamenis Hohenackeri Strauch, 1873) in Azerbaijan World Journal of Zoology 12 (1): 01-06, 2017 ISSN 1817-3098 © IDOSI Publications, 2017 DOI: 10.5829/idosi.wjz.2017.01.06 Distribution, Abundance and Morphological Characteristics of the Transcaucasian Rat Snake (Serpentes: Zamenis hohenackeri strauch, 1873) in Azerbaijan T.M. Iskanderov, S.B. Ahmedov and G.A. Qasymova Institute of Zoology of the NAS of Azerbaijan AZ-1073, A. Abasov street, travel 1128, block 504, Baku city, Azerbaijan Abstract: The article deals with the distribution, number and morphological features and specifies new places for finding the Transcaucasian rat snake in Azerbaijan. Due to these findings, the distribution borders of the species in Azerbaijan along the slopes of the Greater Caucasus widened in the northeast direction (Guba region, Hashi village). The population size is established, which varies in the range of 0.02-0.03 individuals per hectare of biotope area. Locations of the main localities are shown. Morphological characteristics of the species and the main indicators of morphometry and folidosis are given. Morphometric indicators of both sexes indicate the presence of sexual dimorphism. Body length in females is greater (72.9 ± 4.6 cm) than in males (61.5 ± 2.3). Compared to males, the female has a longer body than the tail. Key words: Transcaucasian Rat Snake Distribution Density Morphometric Parameters INTRODUCTION numbers. Special studies on the study of biology, ecology and the state of populations of the The Transcaucasian rat snake (Zamenis Transcaucasian rat snake in Azerbaijan were not hohenackeri Strauch, 1873, synonyms: Coluber carried out. Therefore, sufficient information on the hohenackeri Strauch, 1873; Elaphe taurica Werner, 1898) status of the species in Azerbaijan, in particular, in Azerbaijan is represented by the nominative subspecies information on the number does not exist. The available Z.h.hohenackeri Strauch, 1873. The natural habitat of the literature sources mainly include general information on species occupies the territory of Asia Minor, Northwest the distribution, taxonomy, morphology, biology and Iran, the South Caucasus (Azerbaijan, Georgia, Armenia), ecology of the species [5-8]. Among the works performed North Ossetia, Checheno-Ingushetia, Dagestan and the recently and devoted to the study of the Transcaucasian mountain ranges of southern Lebanon and Northern Israel rat snake, is the work of Akhmedov [8] which addresses [1-4]. The subspecies Z.h.hohenackeri inhabits most of issues of distribution, morphological characteristics the natural habitat. Another subspecies of Z.h.taurica (Folidosis, morphometric criteria) of the species. Werner, 1898 is common in the Cilician Taurus in southern This article is devoted to the study of the eastern Turkey and in the isolated mountain range of distribution, number and morphological features of the southern Lebanon and northern Israel. Transcaucasian rat snake in Azerbaijan. Currently, the Transcaucasian rat snake is one of 8 rare (VU) species of snakes of the official fauna of MATERIALS AND METHODS Azerbaijan. In addition, the Transcaucasian rat snake with different natural preservation status is included in the red The materials of the study were field data on the books of a number of adjacent states (Russian Federation, distribution of the Transcaucasian rat snake, collected by Georgia and Armenia), as well as in the Red List of the the authors in May-June 2004-2006 and 2011-2016 on the IUCN as a species that is vulnerable and declining in slopes and foothills of the Greater Caucasus within Corresponding Author: Iskanderov Tavakkul Mukhtar, Institute of Zoology of the NAS of Azerbaijan AZ-1073, A. Abasov street, travel 1128, block 504, Baku city, Azerbaijan. E-mail: [email protected]. 1 World J. Zool., 12 (1): 01-06, 2017 Azerbaijan. The paper also uses data on the distribution Gyokgol and Dashkasan regions, foothill forests-steppes and morphology of the species presented in the scientific and xerophytic stony slopes were surveyed. On the route literature. The registration of individuals was carried out lines with a total length of 184 km, we met only 2 by a common method [9]. In the biotope zones, pedestrian adults (1 , 1 ). One specimens were found on the lines (Transects) with a width of 4 m were chosen. On the territory of the Gyokgol district, in the vicinity of the basis of the obtained data on the number of individuals village of. Hajikend on rocky, xerophytic slopes (height on transect areas, the density (ind. / per ha) of the of 1,115 m) and the other in the vicinity of the village of. population in the area under study was determined. Zurnabad (altitude 980 m), on a stony slope under rocks Studies were conducted during the period of the greatest (Fig. 1). The sizes of the individuals were respectively: the activity of snakes. On the map, the places of detection of length of the trunk (L) was 69.3 and 78.5 cm and the length individuals were recorded; the coordinates of these of the tail (Lcd) was 12.3-16.4 cm. Thus, in the transect places, the conditions of the biotope (Weather and terrain area, 736.9 hectares (184 Km x 4 m) the number of the conditions, relief, vegetation), the state of activity, etc species was 2 individuals. The relative abundance of were recorded. Taking into account new locations of individuals in the population for these localities is 0.02 finds, as well as information known from the literature, ind. / ha. points of location (cadastre) of the Transcaucasian rat In the north-western and northern parts of the snake in Azerbaijan (Fig. 1) were noted. republic, the territories of the Transcaucasian rat snake In order to collect morphological data, our own and cover mainly the southern slopes of the Greater Caucasus. collector's materials were used in 19 copies (11 and 8 ), There are specimen from the surroundings of village 2 of which were young forms (3-3.5 years). Age-related Zargeran of the Ismayilli region (Collection of Zoology variability in color and body patterns in adults and young Institute of the Russian Academy of Sciences), Agdash individuals had been identified. The main morphometric and Shamakhi cites (Collection of the Institute of Zoology criteria and the folidosis of the body were determined: of the National Academy of Sciences of Azerbaijan) [8]. body length - L, tail length - Lcd, length-to-tail ratio L/ For the north-western part of the republic in the literature Lcd, number of scales around the middle of body - Sq, this species is noted for the environs of Lagodekhi in number of ventral scales - Ventr., number of pairs of the Belokan region and village Perzivan of Zakatala region subcaudal scales - Scd (Table) [8]. S.B. Akhmedov in different years mentioned the Transcaucasian rat snake in the vicinity of the village RESULTS AND DISCUSSIONS Pirkuli and village Sis of Shemakha region on the outskirts of the forest, covered with xerophytic bushes [8]. Distribution and Number: Locations of finds and The collections of the Institute of Zoology of the cadastre of distribution of the Transcaucasian rat snake in National Academy of Sciences of Azerbaijan include Azerbaijan are indicated on the map (Fig. 1). individuals found in the gorge of the river Vilyashchay In western Azerbaijan, this species is widespread (Masalli region) and near the village Alekseyevka of the in the foothills of the Lesser Caucasus, since, as noted Lenkoran region, as well as individuals caught in the above, it was found by Gogenerk and Fritsch as far porcine forests from the lower mountain zones. back as 1838-1840 in the vicinity of present-day Ganja Concerning the distribution of the Transcaucasian rat and Goygel city. In the collections of the Museum of snake in the territory of the Nakhchivan Autonomous the Georgian Academy of Sciences there are specimens Republic, there are only obsolete information [5,6] in from the vicinity of village Zurnabad of Khanlar which this species is indicated for the vicinity of the city region (Now Goygel) [1,4]. Information on the distribution of Ordubad and village Bichenek of Shahbuz region. of the Transcaucasian rat snake on the foothill During the 10-day expedition, we surveyed the and mountain plots of the Lesser Caucasus is also given foothill steppes with light forests, stony slopes and river in the works of Dzhafarova [7]. She identified this banks and counted the number of individuals (The total species in the Kelbajar and Lachin regions (Fig. 1). We length of the walking routes is 285 km). During the conducted a study to establish the density in the walking routes we met only 3 adults ( , , ). One populations of the Transcaucasian rat snake on the individual was found on May 21, 2011 along the road, on slopes of the Lesser Caucasus. In the territory of the a slope, among the stones near the hips (Height 1250 m 2 World J. Zool., 12 (1): 01-06, 2017 above sea level). In the surrounding village Perzivan of Morphology: Transcaucasian rat snake is a medium-sized Zakatala region: length of trunk (L) - 66.3 cm and length of snake (Table). The length of the body (L) of the adults tail (Lcd) - 14.4 cm. The second individual was found on that we measured, varied from 61.5 to 78.1 cm. The length May 27, 2011 in the vicinity of village Junut of Gakh of the tail (Lcd), respectively, was 11.2-16.4 cm, i.e. 4,6-5,2 region on the stony banks of the river Gashgachay, times shorter than body length. germinated with dry herbs and xerophytic shrubs (Height 1420 m above sea level): length of trunk (L) - 70.2 cm and Cervical Interception Is Weak: The wide length of tail (Lcd) - 15.9 cm. The third individual was intermaxillary scute with its blunt edge wedges found in the area of Shemakha, near village Chuhuryurd between the nasal scutes.
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